feat: add Web UI for easy generation and history management (+ history bugfix)

[ugvfpdcuwfnh]

Summary

This PR introduces a lightweight, FastAPI-based Web UI to the ESET-Keygen project, providing a user-friendly way to generate keys and accounts without using the terminal.

Key Features

• Modern Web Interface: A clean, single-page UI built with TailwindCSS and Alpine.js (no Node.js build step required).
• Real-time Log Streaming: Uses WebSockets to stream execution logs from the underlying script directly to the browser.
• Configuration Persistence: Automatically remembers and loads the user's last-used settings (Mode, Email API, Browser, etc.).
• History Management: Includes a local SQLite database (web_data.sqlite) to store and view all previously generated accounts and keys.
• Non-Invasive Architecture: Wraps the existing main.py logic using subprocesses, requiring minimal changes to the core CLI tool.

Additional Bugfix Included (code-only)

• Fixes a web history regression where Generation History could stay empty because get_history() did not return fetched rows.
• Ensures /api/history now returns a JSON-serializable list ([dict(row) for row in rows]).
• Adds observability log when parsing is incomplete and history is not saved:
  • [SYSTEM] Parse incomplete; history not saved (email_found=..., password_found=...)
• Keeps existing success-path history log unchanged.

How to Run

1. Install dependencies: pip install -r requirements.txt
2. Start the web server: python web.py
3. Access at http://localhost:8000

This addition significantly lowers the barrier to entry for local users while keeping the powerful CLI functionality intact.

[ugvfpdcuwfnh]

I have test . The web run successfully！